I don't agree. Well, not completely, I'm sure there is an element to what you're saying.
Posts about resumes will get a lot more attention because 1) everyone has one and 2) nobody really knows who to ask about them whereas they know that SO etc. exist for code questions. Most of the attention will be from people just starting out in their careers, too, and there's nothing wrong with them wanting some help. I know my early CVs could have done with a lot of improvement!
A post offering Ruby code reviews is great, and I imagine it will gradually get attention as time goes by, but the audience is much smaller, even on a site devoted to programmers. I don't know any more Ruby than I needed to tinker with my Sass configuration back in the day, for example.
In fact, it might be cool if all of us who were willing to help out could all jump on a tag like that (Aleksei has gone with #am4cr which is pretty self-explanatory) so if someone made a post like "Please CR my XXX" with that tag, we'd all see it and they'd get a few different opinions. It feels to me that this might be a better solution as one-to-many rather than many-to-one :)
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